Mine drill



June 24, 1930. w. HIARASIMIAK NINE DRILL I Filed July 5, 1928 s Sheets-Sheet 1 INVENTOR.

J. Y m :L m@ w M June 24, 1930. w. HARASIM'IAK MINE DRILL s- Sheets-Sheet 3 Filed July 5, 1928 INVENTOR.

Patented June 24, 1930 1 PATENT: orricr.

wAoLAw HARASIMI K, or CAMDEN; NEW JERSEY MINE DRILL Application filed July 5,

This invention relates to certain new and useful improvements in 1111116. drills or angers and is intended for use by miners in drilling holes for setting powder blasts and the like and has for its primary object to provide improved screw feeding means for the drill comprising removable screw clamping jaws for engagement with the drill feed screw whereby the clamping screw jaws may be removed and a new cooperating drill feed screw substituted of adiffen ent tread pitchwhereby the drill feed screw may be fed forwardly at different speeds for accommodating the drill to wallstrata of different densities. j

A further object of the invention is to provide a mine drill of the above kind wherein the drill rod feeding screwis supported in the frame that iscapable of being supported alone upon the side wall of a mine room or, the like, or jointlysupported upon the side wall and the-floor, V

- With the above and other-objects in view that will become apparent as the nature of theinvention is better understood, the same consists in thenovel form, combination and arrangementof parts hereinafter more fully described, shown in the accompanying drawings and claimed. 1 i In the drawings V fiFigure 1 is aside elevational view of a mine drill constructed in accordance with the present invention, the same being illustrated as supported on the side walls ofa mine room or the like, the lower anchor or mounting rod being illustrated in a dotted line position .with'the. lower end thereof intended for, floor engagement; 1 h

Figure '2 is a top plan view of the mine drill; Figure 3 is a front elevational view; :Figure 4 is a, rear elevational view;

,Figure .5 is" a fragmentary longitudinal' sectional View taken on line 55 of Figure 2 showing the expandingsocket switch for the upper supporting rod of the drill frame; Figure 6 is an enlarged detail sectional view taken on-line 6-6 of Figure 2;

' Figure? 1 is an enlarged sectional View taken-on line 7-7 of Figure .6; and

. frame.

19%. Serial No. 290,545.

of the block supporting the jaws. The drill comprises a supporting frame having side bars 1. connected at their oppo site ends by rotatably adjustable. shafts, 2 and 3 at their upper and lower ends respectively, the shafts 2 and 3 being' held in rotatably adjusted positions by cap nuts 4 threaded on the projecting ends of the shafts outwardly of the side bars of the The frame supports a block .5 intermediate the endsthereof and between the same in which a feed screw fora drill, rod is mounted while devices are associated with the end cross shafts 2 and3 for supporting the frame r Thesupports associatedwith the upper cross shaft 2 is shown more clearly in Figures 1 and 5 and comprises a rod6 threaded j ward end of the rod 6 is in the nature of an expanding wedge to 5 be positioned in the manually chiseled opening 11 in the wall 12 shown in Figure 1. The expanding wedge end ;of the rod 6 comprises a socketed end portion 13 in which is slidably mounted the stub shaft 14 with the wedge head 15-upon the forward end thereof. The forward end of the end portion 13 of the ,rod' 6 is an nularly reduced and externally threadedas at 16 to receive the inner threaded end 17 of the longitudinally split expanding jaws 18 that enclose the wedge head 15. The stub shaft 14; is longitudinally shifted in the socketed end 13 of therod 6, the rod end 13 having anannular enlargement externally threaded as at 19 with a longitudinally extending slot 20 formed in-a sidewall of the enlargement and into which slot the pin 21 laterally projecting from the shaft 14 extends. The pin 21 extends into .an inner annular groove 22 formed in the nut- 23 so 19, the nut is shifted longitudinally of the rod end 13 to carry therewith the pin 21 and stub shaft 14. As the jaws 18 are formed of resilient metal, the same are forced open upon forward projection of the wedge head andare automatically retracted when the wedge head 15 and shaft 14- are drawn into the socketed end 13 of the rod '6. The rod end 13 is illustrated in Figure 1 as mounted in. the chiseled opening 11 in the wall 12 and supports the upper end of'the frainethat' carries the drill rod feeding screw.

The support for the lower end of the frame comprises a rod .24 threaded at one end as at and passing through an opening in'the head 8 that is carried by the cross shaft 3, similar to the support for therod 6. The shaft 3 is held in rotatably adjusted position by the nuts 4 as indicated by the dotted and full line positions of the rod 24- in F ig'ure'l, while the longitudinal adjustment of the rod is accomplished by the j ainb nut 10 cooperating with the aperture'd. head 8. The forward pointed end of the rod 24 T 'maybe driven into an opening inthe wall 12, or the end of said rod may engage the "outer face of the wall, or further be disposed in the vertical position for engaging the ground or floor as illustrated by dotted lines. The block, or body 5 that supports the drill rod feeding screw carries side trunnions 26 supported in bearing slots 27 formed in the side bars 1 of the'frame the threaded projecting ends 28 of the trunnions 26 receiving cap nuts 29 for holding the block or body 5 in adjusted position. The slots 27"are of bayonet formation with ;the lateral exten- [sions thereof preferably disposed at the upper ends so that the block maybe supported gitudinally shifting movement.

extending into the central openingthereoff The sleeve is rotated through the medium of a gear train, the gear 36 being fixed tothe projecting end of the sleeve 31 as shown in Figure .6 that is engaged by the pinion 37 journaled on the bracket arm 38 carried by the block 5, the bracket arm 38 further supporting the gear 39' meshing with the pinion an'dwhich gear 39 iso'perated by the handle 40. Itwill therefore be seen that uponrotation of the gear 39, the gear 36 will be rotated and such movement imparted tothe sleeve 31; p a drill rod feeding screw "'41 extends a through the bore of the sleeve 31 and is provided with a longitudinal keyway 42 into which the key extends. The drill rod feeding screw 41 isrotated with the sleeve 31 and longitudinal screw feeding thereof is accomplished by the provision of two thread jaws 43 and 44 detachably carried by the block 5'and havingthe threads thereof of pitch similar to the thread pitch of the drill rod feeding screw 41. The screw block thread jaws are connected together and are detachablymounted on the side of the block 5, opposite tlie'gear36, the opposedface of one of the thread jaws carrying a wear plate 45 laterally of the threaded portion 46. V The "thread jaws 43 and 44 are each provided with a radial slot 47 aligned with each other and through which slotsa retaining screw bolt 43 extends for anchoring in the block 5; The opposite side edges of thetwo thread jaws 43fand-"44 have airinter-engaging or dove-.

tailed connection44 'with side flanges of the block 5whereby the two jaws are laterally slid intoposition, onthe block 5 tojbe' re- 5 I tained by the screw bolt 48' as shown inFigure'8. The two thread jaws 43 and 44 have a spring connection therebetween and the threaded portions of; said jaws are moved into engagement with the drill rod feed screw by a cam lever.

As shown in Figure-7, the two jaws-43 V V and 44 at. opposite sides of the central threaded cavities are provided with aligned openings 49, therod 50 disposed in said aligned openings having one end annularly enlarged and threaded as at 51 for threaded engagement with an opening at the outer end of the thread jaw '44 while the other end of the rod 50 clearly extends through the opening 49in the thread jaw 43. An annul'ar shoulder 43 is formed on the walljof the opening 49 in the thread jaw" 43 adjacent theouter end thereof and formsangabutment for one end of the coiledspri'ng52 that* sui'rouiids the rod 50 while-the other end of the spring engagesthe closed outer end of the opening 49 in'said jaw '44; The

ends of the rod-5'0 that extend through the y openings in the two thread terminate outwardly of the thread. "jaw 43., the same being'threaded their ends. as at 53 in I threaded engagement with the angle ends of the yoke 54. A- cam'55 is pivotally supported on the yoke 54 intermediatejthe ends thereof and carries an operating lever 56; the j cam 55 being movable iii-to engagementwith the outer face or side of-the. aw 43as shown in Figure '6 for causing the two thread jaws 43 and 44 to move toward eachother against the tension ofthe'springs 52 for threaded engagement with the drill'rod feed screw 41.'

From the above detailed description of the invention, it, is believed that the construction and ope'ration thereof' will at once be apparent,jit being noted-that theprimary object of the'invent'ion is" to provideinterchangeable thre'ad jaws 43"and 44, and an interchangeable drill rod feed screw 41' so that thread jaws and a feed-screw of a larger thread text may be utilized for boring a powder blast opening in a relatively soft wall while thread jaws and a feed screw of a finer thread pitch may be utilized for a harder wall of greater density. Rotation of the drill rod feed screw 41 is accomplished upon rotation of the gear 36 of the gear train that is fixed to the sleeve 31 carrying the longitudinal key 35 that extends into the groove 42 of the feed screw, these devices imparting rotary movement to the screw while longitudinal feeding movement thereof is accomplished by the thread jaws 43 and 44 which are locked to the stationary block 5 by the screw bolts 48, while they'have threaded engagement with the fed screw as snown in Figures 6 and 7 \Vhile there is'herein shown and described the preferred embodiment of the present invention, it is nevertheless to be understood that minor changes may be made therein without departing from the spirit and scope of the invention as claimed. I

Vhat I claim as new is 1. In a miners drill, a frame, a block mounted on the frame, a pair of relatively movable thread jaws detaohably mounted on the block, a drill rod feeding screw extending through the block and adapted to be engaged by the thread jaws, rotatable means on the block having a spline connection with the feed screw, springs normally separating the jaws, guide pins for the jaws surrounded by the springs, and means for closing the jaws against the spring tension thereon positioned eXteriorly of the jaws and connected to the pins.

2. In a miners drill, a frame, a block mounted on the frame, a pair of relatively movable thread jaws detachably mounted on the block, a drill rod feeding screw extending through the block and adapted to be engaged by the thread jaws, rotatable means on'the block having a spline connection with thefeed screw, said jaws having alined openings therein, pins anchored in the openings of one jaw and freely extending through the opening of the other jaw, a spring surrounding each pin and engaging the jaws to normally separate the same, a yoke connecting the pins outwardly of'the jaws, and a cam lever pivoted on the yoke cngageable with the jaws to close the same on the feeding screw. 1

3. In a miners drill, a frame, a block mounted on the frame, a pair of relatively movable thread jaws detachably mounted on one, side of the block, a drill rod feeding I screw extending through the block and adapted to be engaged by the thread jaws, rotatable means on the block having a spline connection with the feed screw, spring devices for normally holding the jaws separated and a cam carried by said spring de-. vices for moving the jaws into clamping engagement with the feed screw, the spring devices including registering openings in the jaws, pins extending through the openings and anchored at corresponding ends in one jaw, a shoulder at the outer end of the openings in the other jaw, a coil springsurrounding each pin and confined by the an; chored ends and shoulders, and said cam being attached to the projecting ends of the pins. I 4:. In a miners drill, a frame, a block mounted on the frame, a pair of relatively movable thread jaws detachably mounted on one side of the block, a drill rod feeding screw extending through the block and adapted to be engaged by the threadjaws,

rotatable means on the block having a spline connection with the feed'screw, spring devices for normally holding the jaws sepa- I rated and a cam carried by said spring devices for moving the jaws into clamping engagement with the feed screw,'the sprlng devices including registering openings in the jaws, pins extending through the openings and anchored at corresponding ends in one jaw, a shoulder at the outer end of the openings in the other jaw, a coil spring surrounding each pin and confined by the anchored ends and shoulders, a cross yoke on I the projecting ends of the pins and said 7 i v cam being attached to the cross yoke.

In testimony whereof I affix my signature.

WACLAVV HARASI-MIAK.

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